Originally posted by Рагнар:

Originally posted by wizard_of_woz:

What mods do you have installed?

there are no mods, now I found out that the raid starts absolutely everywhere, except for the base of the second player

How much building have they done? There are claims (that I am inclined to believe but have not personally experienced) that if you have enough spawn-negating buildings around you can weather a raid without any enemies having the chance to spawn in and attack.